Gluer



NOV. 20, 1934. 055 1,981,038

GLUER Filed 001. 21, 1931 2 Sheets-Sheet 1 LI V4 1 l l 1 l HAR DLEI J.GU55.

INVENTOR.

ATTORNEY;

H. J. GOSS GLUER Nov. 20, 1934.

Filed Oct. 21, 1931 2 She'etS-Sheet HAROLD J. 6088.

INVENTOR.

A TTORNEYK.

Patented Nov. 20,

- UNITED STATES "PATENT OFFICE wen Harold J. GossQNashna, N. 11.,assignor to The International Paper Box Machin e company,

Nashua, N. 11., a corporation of Maine Application October 21, 1931,Serial No. 570,116

struction, especially for the purpose of maintain ing a uniform quantityof glue and also to prevent throwing oil the adhesive at high speeds andalso to prevent stringing of the adhesive.

Another feature is scraping means of acertain peripheral dimension withrelation to the openings of said pockets.

Another feature is a spiral groove provided on the end of the glue wheelto provide lubrication and to prevent wear between the wheel and theside scrapers.

Other features will be pointed out below.

My gluer represents an advance in the art of spot gluing and especiallyin the use of spot top gluing which has always presented difliculties.Spot gluing of restricted areas of individual blanks has always formerlybeen done by transfer segments. The glue builds up on the edges of thesesegments and consequently it is impossible to accurately determinethequantity of glue that is going to be applied by the segment, this beingespecially true if there is a slap in the feed of the blanks or a changein speed. Further, as the segment breaks away from theglue supply wheelthere is objectionable stringing of the glue. At high speeds theglueactually throws away and gathers onto the machine parts where it candrip down and seriously gum up the mechanism. The transfer type of gluepot is especially objectionable on cellophane applying machines becauseon these machines the glue control governs the production. In otherwords a very little gluewrongly placed will cause the cellophane totransfer from the blank to the applying mecha-- nisms.

Glue pots have been made using wheels with recesses in them such as thatdisclosed in U. 8. Letters Patent No. 1,793,082 dated February 1'1,1931. However thistype of pot is a bottom glue pot and consequently thepockets are drilled large and shallow as they simply carry around asupply of glue. Neither was it necessary to scrape the remainder of thewheel dry for the purposes to which this pot was put was simply to makethe supply of glue in some sections much heavier than the remainder. 7

With a top glue pot, that is, one in which the glue is applied on top ofa blank I have discovered that the holes or pockets. should be verysmall and very deep compared to their diameter. This type of holebrought astonishing results. The glue was forced up into the holes butnever forced the air out of the pockets completely. 7 Thus by using ascraper peripherally longer than M the open end of the hole the gluecould be compressed into the hole and immediately after passing thescraper it was forced to protrude again by the compressed air in theshape of a pimple or button. The compression being constant theprotrusion is constant and gravity or centrifugal force cannot cause theglue to throw off because of the greater pull of vacuum after the pimpleor button is formed. 4

Thus speed has no effect on this glue pot and neither is there anyopportunity for the glue to build up to any surplus whether the glue isbeing used up by blanks or not. A scraper whose active edge isperipherally larger than said open end is essential as otherwise the airpressure built I up as the glue is compressed into the holes causes theglue to shoot around or by-pass the scraper and build up onto the underside of the scraper. My single wheel top glue pot permits the glue potto-be completely covered to prevent the evaporation of solvent which isused in some glue especially the moisture proof cellophane glues. In thedrawings Figure 1 is a plan of a gluer embodying. my invention;

Figure 2 is an elevation thereof; Figure 3'is an elevation inperspective of a portion of the mechanism;

Figure 4 is an elevation of the scraper and a partial elevation of theglue wheel, on a larger scale; and

Figure 5 is a plan of a blank that has been operated on by the wheelshown in Figures 1' to 4.

Glue wheel or roll 1 isprovided at its periphery with pockets or holes2, these being located to apply glue at the spots or portions of theblank as desired as, for example, at the spots 3 of blank 4 in Figure 5.a

Each hole or pocket is preferably substantially cylindrical and extendsinwardly from the 1 periphery of wheel 1. The depth of each pocket .isvery substantially greater than the diameter,

or other dimension, of the pocket at the periphery of the wheel for thepurposes describedabove and preferably such depth is more than twice asgreat as such diameter or other dimension. Each end face of wheel 1 isprovided with a spiral groove 5, (only one being shown) this groovecarrying glue to provide lubrication between the side scrapers 6 (to belater described) 119 and the end faces of the wheel and also serving toprevent leakage by preventing wear of the parts, said groove working theglue or other adhesive back into the pot.

The scraper 7 has an edge 8 tangential to, and preferably contactingwith, the wheel and of arcuate form, the dimension of this edge alongthe periphery of the wheel being at least as great a as the opening ofthe pocket at said periphery,

the scraper, in the form shown, extending transversely of the machinealong the entire length of the wheel and slightly beyond the end facesthereof.

The blank is suitably fed along the path indicatedby the line 9 andbetween the wheel 1 and the corrugated roller 10 which may be operatedin any suitable way and preferably at the same surface speed as that ofthe wheel 1, the glue being deposited on top of the blank.

The side scrapers 6 rest on the scraper 7 and prevent leakage betweenthe scrapers 6 and scraper I. Said scrapers 6 may beheld in position byscrews 11 on the frame engaging rece :ses 12 in the side scrapers.Shoulders l3 prevent leakage around the side scrapers. Said scrapers 6are a close fit to theends of the wheels.

The scraper 'l is attached to the frame by screws 14 and is slotted foradjustability and screw 15 is provided for such adjustment and to givepositive pressure against the outer end of the scraper to press the edge8 against the wheel 1.

Wheel 1 has hub 16 and is keyed to shaft 1'7v which may be operated inany suitable way. The hubs 16 turn in the bearings of the glue pot whichis supported on shafts l7 and 18, the latter being fixed and preventingrotation of the glue pot.

The outer wall of. the glue pot is indicated at 19, the glue wheelitself forming a wall.

My wheel has pockets of such depth that alternate pressure and vacuumeffects are created in the pockets, the depth being such thatall the aircan not escape. Moreover the pockets are of such capacity compared tothe peripheral exposure of the pockets that the adhesive cannot hardenin the pockets by oxidation.

It will be clear that the pockets in my wheel are grouped to correspondwith certain predetera mined areas of the blank to which adhesive is tobe applied and that I provide means for reto momentarily compressadhesive into said pockets to cause the adhesive to project from thepockets when the compression is over.

What I claim is: r

l. A device of the character described comprising a rotary member havingpockets which are open at the periphery of said member,"the depth of apocket being greater than twice the distance across its opening; andmeans to force adhesive into said pockets; and means extendingperipherally completely across each pocket to prevent the adhesive fromby-passing. i

.2. The combination of a wheel provided with pockets to receiveadhesive,'the depth of each pocket being at least twice the distanceacross its opening to confine air at all times at the base of the pocketto create-alternate pressure and vacuum effects in the pocket; and amember col 6 operating with said pockets to accomplish said effects.

3. A device of the character described comprising a rotary member havingpockets which are open at the periphery of said member, the depth of apocket being at least twice the distance across its opening to confineair at all times at the bases of the pockets; means to force adhesiveinto said pockets; and means extending peripherally completely acrosseach pocket to prevent the adhesive from by-passing, the axis of saidrotary member and said extending means having a fixed relation whenoperating.

' 4. A device of the character described co'mpris ing a rotary memberhaving cylindrical pockets which are open at the periphery of saidmember, the depth of a pocket being at leasttwice the distance acrossits opening to confine air at all times at the bases of the pockets;means to force adhesive into said pockets; and means extendingperipherally completely across each pocket to prevent the adhesive fromby-passing.

5. A device'of the character described comprising a rotary member havingpockets which are open at the periphery of said member, the depth ofeach pocket being at least twice the distance across its opening toconfine air at all times at the bases of the pockets; means to forceadhesive into said pockets; and means extending peripherally completelyacross each pocket to prevent the adhesive from by-passing. v

6. The combination of a wheel provided with pockets to receive adhesive,the depth of each pocket being at least twice the distance across itsopening so that all the air in said pockets can not escape; and a membercooperating with said pockets to prevent the escape of all of said air.

7. In a mechanism of the character described a rotary member having aplurality of pockets in its periphery, said pockets grouped tocorrespond with certain predetermined areas of a blankv to which glueisto be applied, the depth of each pocket being at least twice thedistance across its opening to confine air at all times at the bases ofthe pockets; and means to momentarily compress glue into said pockets tocause the air to force the glue from said pockets when the compressingaction is over.

8. In a mechanism of the character described a rotary member comprisingpockets in its periphery, the depth of each pocket being at least twicethe distance across its opening to confine air at all times at the basesof the pockets; and means for removing glue from the surface of saidmember adjacent to said pockets and to momentarily compress glue intosaid pockets to cause said air to efiect a projection of the glue fromthe pockets when the compressing action is over. v

9. A device of the character described comprising a rotary member havingpockets which are open at the periphery of said member, the depth of apocket being at least twice the distance across its opening to confineair at all times at the bases of the pockets; and a member having oneface to force adhesive into said pockets and having another faceextending peripherally complete- 1y across each pocket to prevent theadhesive from by-passing.

HAROLD J. GOSS.

